U.S. patent application number 17/126082 was filed with the patent office on 2021-12-16 for filter with combined wear indication and pull tab.
The applicant listed for this patent is KONINKLIJKE PHILIPS N.V.. Invention is credited to MATTHEW SCOTT ANSWINE, MARK WAYNE BARCLAY, MARK WILLIAM DIMATTEO.
Application Number | 20210386956 17/126082 |
Document ID | / |
Family ID | 1000005867702 |
Filed Date | 2021-12-16 |
United States Patent
Application |
20210386956 |
Kind Code |
A1 |
DIMATTEO; MARK WILLIAM ; et
al. |
December 16, 2021 |
FILTER WITH COMBINED WEAR INDICATION AND PULL TAB
Abstract
A filter assembly for filtering a flow of incoming air entering
a pressurized breathing gas system includes a filter housing and a
filter media. The filter media includes a filtering section and a
non-filtering section. The filter housing is structured to be
inserted within a pressure generating device used in the
pressurized breathing gas system. The filtering section is disposed
within the filter housing and is structured to filter contaminant
matter from the flow of incoming air. The non-filtering section is
disposed outside of the housing and is structured to be separated
from the filtering section so as to not make contact with the flow
of incoming air. The filtering section and the non-filtering
section are structured to be visually compared to one another such
that a contaminant matter saturation level of the filter media can
be determined.
Inventors: |
DIMATTEO; MARK WILLIAM;
(IRWIN, PA) ; BARCLAY; MARK WAYNE; (PITTSBURGH,
PA) ; ANSWINE; MATTHEW SCOTT; (APOLLO, PA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
KONINKLIJKE PHILIPS N.V. |
Eindhoven |
|
NL |
|
|
Family ID: |
1000005867702 |
Appl. No.: |
17/126082 |
Filed: |
December 18, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
62953244 |
Dec 24, 2019 |
|
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A61M 16/0066 20130101;
A61M 2016/003 20130101; A61M 16/107 20140204; A61M 16/06
20130101 |
International
Class: |
A61M 16/10 20060101
A61M016/10; A61M 16/00 20060101 A61M016/00; A61M 16/06 20060101
A61M016/06 |
Claims
1. A filter assembly for filtering a flow of incoming air entering
a pressurized breathing gas system, comprising: a filter housing;
and a filter media, comprising: a filtering section; and a
non-filtering section, wherein the filtering section is disposed
within the filter housing, wherein the non-filtering section is
disposed outside of the filter housing, wherein the filter housing
is structured to be inserted within a pressure generating device
used to generate a flow of pressurized air for delivery to an
airway of a user of the pressurized breathing gas system, wherein
the filtering section is structured to filter contaminant matter
from the flow of incoming air, wherein the filter housing comprises
a filtering boundary structured to separate the non-filtering
section from the filtering section such that the non-filtering
section is isolated from the flow of incoming air, and wherein the
filtering section and the non-filtering section are structured to
be visually compared to one another such that a contaminant matter
saturation level of the filter media can be determined.
2. The filter assembly of claim 1, wherein the filtering boundary
comprises a seal.
3. The filter assembly of claim 2, wherein the seal is formed by
over-molding the housing around the filtering section.
4. The filter assembly of claim 1, wherein the non-filtering
section is in a same geometric plane as the filtering section.
5. The filter assembly of claim 1, wherein the non-filtering
section is structured to be used as a pull tab such that the filter
media can be removed from the filter housing by pulling the
non-filtering section away from the filter housing.
6. The filter assembly of claim 5, wherein a first edge of the
non-filtering section is formed by the filtering boundary, wherein
a second edge of the non-filtering section comprises an edge of the
non-filtering section disposed opposite of the first edge, and
wherein a distance from the first edge of the non-filtering section
to the second edge of the non-filtering section measures at least
1.0 centimeter.
7. The filter assembly of claim 5, wherein a first edge of the
non-filtering section is formed by the filtering boundary, wherein
a second edge of the non-filtering section comprises an edge of the
non-filtering section disposed opposite of the first edge of the
non-filtering section, wherein the second edge of the non-filtering
section comprises an outer edge of the filter media, wherein an
inner edge of the filter media, disposed within the filter housing,
comprises an edge of the filter media opposite the outer edge of
the filter media, wherein a length of the non-filtering section
comprises a distance measured from the first edge of the
non-filtering section to the second edge of the non-filtering
section, wherein a length of the filter media comprises a distance
measured from the inner edge of the filter media to the outer edge
of the filter media, and wherein the length of the non-filtering
section measures at least 20% of the length of the filter
media.
8. A method for filtering a flow of incoming air entering a
pressurized breathing gas system, comprising: providing a filter
assembly, comprising: a filter housing; and a filter media,
comprising: a filtering section; and a non-filtering section;
disposing the filtering section within the filter housing;
disposing the non-filtering section outside of the filter housing;
inserting the filter assembly within a pressure generating device
used to generate a flow of pressurized air for delivery to an
airway of a user of the pressurized breathing gas system, filtering
contaminant matter from the flow of incoming air with the filtering
section; separating the non-filtering section from the filtering
section with a filtering boundary of the filter housing such that
the non-filtering section is isolated from the flow of incoming
air; and determining a contaminant matter saturation level of the
filter media by visually comparing the filtering section to the
non-filtering section.
9. The method of claim 8, wherein the filtering boundary comprises
a seal.
10. The method of claim 9, wherein the seal is formed by
over-molding the housing around the filtering section.
11. The method of claim 8, wherein the non-filtering section is in
a same geometric plane as the filtering section.
12. The method of claim 8, further comprising: structuring the
non-filtering section to be used as a pull tab such that the filter
media can be removed from the filter housing by pulling the
non-filtering section away from the filter housing.
13. The method of claim 12, wherein a first edge of the
non-filtering section is formed by the filtering boundary, wherein
a second edge of the non-filtering section comprises an edge of the
non-filtering section disposed opposite of the first edge, and
wherein a distance from the first edge of the non-filtering section
to the second edge of the non-filtering section measures at least
1.0 centimeter.
14. The method of claim 12, wherein a first edge of the
non-filtering section is formed by the filtering boundary, wherein
a second edge of the non-filtering section comprises an edge of the
non-filtering section disposed opposite of the first edge of the
non-filtering section, wherein the second edge of the non-filtering
section also comprises an outer edge of the filter media, wherein
an inner edge of the filter media, disposed within the filter
housing, comprises an edge of the filter media opposite the outer
edge of the filter media, wherein a length of the non-filtering
section comprises a distance measured from the first edge of the
non-filtering section to the second edge of the non-filtering
section, wherein a length of the filter media comprises a distance
measured from the inner edge of the filter media to the outer edge
of the filter media, and wherein the length of the non-filtering
section measures at least 20% of the length of the filter media.
Description
1. FIELD OF THE INVENTION
[0001] The present invention pertains to pressurized breathing gas
systems, and, more particularly, to filters used in pressurized
breathing gas systems, and a method for determining when
replacement of said filters is necessary.
2. DESCRIPTION OF THE RELATED ART
[0002] Many individuals suffer from disordered breathing during
sleep. Sleep apnea is a common example of such sleep disordered
breathing suffered by millions of people throughout the world. It
is known to deliver positive airway pressure (PAP) to treat a
medical disorder, such as chronic obstructive pulmonary disease
(COPD) or sleep apnea syndrome, in particular, obstructive sleep
apnea (OSA). Known PAP therapies include continuous positive airway
pressure (CPAP), wherein a constant positive pressure is provided
to the airway of the patient in order to splint open the patient's
airway, and variable airway pressure, wherein the pressure provided
to the airway of the patient is varied with the patient's
respiratory cycle.
[0003] Pressurized breathing gas therapies such as CPAP involve the
placement of a patient interface device including a mask component
on the face of a patient. The mask component may be, without
limitation, a nasal mask that covers the patient's nose, a nasal
cushion having nasal prongs that are received within the patient's
nares, a nasal/oral mask that covers the nose and mouth, or a full
face mask that covers the patient's face. The patient interface
device interfaces the ventilator or pressure support device with
the airway of the patient, so that a flow of breathing gas can be
delivered from a pressure/flow generating device to the airway of
the patient. It is known to maintain such devices on the face of a
wearer by a headgear having one or more straps adapted to fit
over/around the patient's head.
[0004] Air filters, specifically air inlet filters, are an
important part of airway pressure support systems. Not only do they
protect the inner workings of the device by preventing foreign
matter from entering the unit, but they also protect the patient
from airborne contaminants. In the current airway pressure support
system market, air filters are typically die cut pieces of filter
media that sit at the air inlet of the device.
[0005] There are two types of air filters that are commonly used in
airway pressure support systems. The first type of filter, referred
to as a coarse particle filter, is structured to trap and filter
relatively large pieces of gross particulate matter from the air
before it enters the airway pressure support system. The second
type of filter, referred to as a fine particle filter, is designed
to be employed in combination with a coarse particle filter and is
structured to trap and filter smaller pieces of particulate matter
and airborne contaminants that would not otherwise be filtered by
the coarse particle filter. Use of a fine particle filter in an
airway pressure support system is typically optional. Thus, in
practice, an airway pressure support system may be used with a
coarse particle filter alone or with a combination of a coarse
particle filter and a fine particle filter. When used in
combination, the course particle filter and fine particle filter
are placed in series with one another.
[0006] Visually determining when a filter is saturated with
particulate matter and needs to be replaced can be difficult. This
is especially true if the filter is dark in color and the saturated
media is not much different in contrast than the original, unused
media. Even when the filter media is light in color, e.g. white,
there may not be an obvious change in color of the media to
indicate that it is time to change the filter.
[0007] There is thus a need for a mechanism for use with
pressurized breathing gas systems which makes it readily apparent
when a filter media needs to be changed.
SUMMARY OF THE INVENTION
[0008] Accordingly, one or more embodiments provide a filter
assembly configured to facilitate ease in visually determining when
a filter media for a pressurized breathing gas system needs to be
changed, by using one section of the filter media to filter a flow
of incoming air to the system and isolating another non-filtering
section of the media from the flow of incoming air, such that a
difference in the contaminant saturation level of the filtering
section compared to the non-filtering section is apparent. In one
embodiment, a filter assembly for filtering incoming air entering a
pressurized breathing gas system includes a filter housing and a
filter media. The filter media includes a filtering section and a
non-filtering section. The filter housing is structured to be
inserted within a pressure generating device used to generate a
flow of pressurized air for delivery to an airway of a user of the
pressurized breathing gas system. The filtering section is disposed
within the filter housing. The non-filtering section is disposed
outside of the filter housing. The filter housing comprises a
filtering boundary structured to separate the non-filtering section
from the filtering section such that the non-filtering section is
isolated from the flow of incoming air. The filtering section and
the non-filtering section are structured to be visually compared to
one another such that a contaminant matter saturation level of the
filter media can be determined.
[0009] In another embodiment, a method for filtering incoming air
entering a pressurized breathing gas system includes: providing a
filter assembly including a filter housing and a filter media, the
filter media including a filtering section and a non-filtering
section; disposing the filtering section within the filter housing
and disposing the non-filtering section outside of the filter
housing; inserting the filter assembly within a pressure generating
device used with the pressurized breathing gas system; filtering
contaminant matter from the flow of incoming air with the filtering
section; separating the non-filtering section from the filtering
section such that the non-filtering section is isolated from the
flow of incoming air; and determining a contaminant matter
saturation level of the filter media by visually comparing the
filtering section to the non-filtering section.
[0010] These and other objects, features, and characteristics of
the present invention, as well as the methods of operation and
functions of the related elements of structure and the combination
of parts and economies of manufacture, will become more apparent
upon consideration of the following description and the appended
claims with reference to the accompanying drawings, all of which
form a part of this specification, wherein like reference numerals
designate corresponding parts in the various figures. It is to be
expressly understood, however, that the drawings are for the
purpose of illustration and description only and are not intended
as a definition of the limits of the invention. As used in the
specification and in the claims, the singular form of "a", "an",
and "the" include plural referents unless the context clearly
dictates otherwise.
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIG. 1 is a is a schematic diagram of a pressurized
breathing gas system which employs the use of a filter assembly
according to an exemplary embodiment of the disclosed concept;
[0012] FIG. 2 is an illustration depicting how a filter assembly is
inserted into a pressure generating device for a pressurized
breathing gas system according to an exemplary embodiment of the
disclosed concept;
[0013] FIGS. 3A-G show plan, side, and perspective views of a
filter assembly according to an exemplary embodiment of the
disclosed concept; and
[0014] FIGS. 4A-4E are illustrations of a filter assembly according
to an exemplary embodiment of the disclosed concept.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS
[0015] As used herein, the singular form of "a", "an", and "the"
include plural references unless the context clearly dictates
otherwise. As used herein, the statement that two or more parts or
components are "coupled" shall mean that the parts are joined or
operate together either directly or indirectly, i.e., through one
or more intermediate parts or components, so long as a link occurs.
As used herein, "directly coupled" means that two elements are
directly in contact with each other.
[0016] As used herein, the word "unitary" means a component is
created as a single piece or unit. That is, a component that
includes pieces that are created separately and then coupled
together as a unit is not a "unitary" component or body. As
employed herein, the statement that two or more parts or components
"engage" one another shall mean that the parts exert a force
against one another either directly or through one or more
intermediate parts or components. As employed herein, the term
"number" shall mean one or an integer greater than one (i.e., a
plurality).
[0017] Directional phrases used herein, such as, for example and
without limitation, top, bottom, left, right, upper, lower, front,
back, and derivatives thereof, relate to the orientation of the
elements shown in the drawings and are not limiting upon the claims
unless expressly recited therein.
[0018] FIG. 1 shows a schematic diagram of pressurized breathing
gas system 1. Pressurized breathing gas system 1 includes a
pressure generating device 2 for delivering a flow of breathing gas
to a patient 100 through a mask 3, which is typically worn by or
otherwise attached to patient 100 to communicate the flow of
breathing gas to the airway of patient 100. In the illustrated
exemplary embodiment shown in FIG. 1, mask 3 is a nasal/oral mask.
It will be appreciated, however, that mask 3 can be a nasal mask, a
pillows style nasal cushion, a cradle style nasal cushion, a full
face mask, or any other patient interface device that provides a
suitable gas flow communicating function without departing from the
scope of the present invention.
[0019] Pressure generating device 2 includes a gas flow generator
4, such as a blower used in a conventional CPAP or bi-level
pressure support device, which receives breathing gas, generally
indicated by arrow C, from any suitable source, e.g., a pressurized
tank of oxygen or air, the ambient atmosphere, or a combination
thereof. Gas flow generator 4 generates a flow of breathing gas,
such as air, oxygen, or a mixture thereof, for delivery to an
airway of patient 100 at relatively higher and lower pressures,
i.e., generally equal to or above ambient atmospheric pressure. A
filter assembly 401 (shown in FIGS. 3A-3E) is disposed within gas
flow generator 4 near opening 5 of gas flow generator 4 such that
breathing gas C can be filtered before delivery to the airway of
patient 100. The pressurized flow of breathing gas, generally
indicated by arrow D from gas flow generator 4, is delivered via a
delivery conduit 6 to mask 3.
[0020] Pressurized breathing gas system 1 further includes flow
sensor 7 that measures the flow of the breathing gas within
delivery conduit 6. In the particular embodiment shown in FIG. 1,
flow sensor 7 is interposed in line with delivery conduit 6, most
preferably downstream of valve 8, which controls pressure. Flow
sensor 7 generates a flow signal Q.sub.MEASURED that is provided to
controller 9 and is used by controller 9 to determine the rate of
flow of gas at patient 100, referred to as Q.sub.PATIENT. It will
be appreciated that a pressure generating device 2 may employ other
configurations of pressure control and flow sensing without
departing from the scope of the disclosed concept.
[0021] Controller 9 includes a processing unit, such as, for
example, a microprocessor, a microcontroller or some other suitable
processing device, and a memory (that is provided as part of the
processing unit or that is operatively coupled to the processing
unit) that provides a tangible storage medium for data and software
routines executable by the processing unit for controlling the
operation of pressurized breathing gas system 1. Input/output unit
10 is provided for setting various parameters used by pressurized
breathing gas system 1, as well as for displaying and outputting
information and data to a user, such as a clinician or caregiver.
It will be appreciated that input/output unit 9 may include
physical buttons, turn knobs, or any other means for enabling a
user to enter input into input/output unit 10 without departing
from the scope of the disclosed concept.
[0022] FIG. 2 is an illustration depicting how a filter assembly
401 is inserted into a pressure generating device 2 according to an
exemplary embodiment of the disclosed concept. Filter assembly is
also shown in FIGS. 4A-4E and includes filter housing 402 and
filter media 403. Filter housing 402 of filter assembly 401 is
structured to engage with slot 201 of pressure generating device 2
such that filter assembly 401 fits securely within slot 201. A
secure fit of filter housing 402 within slot 201 is facilitated by
including features (shown in FIGS. 3A-3F) on filter housing 402
that are complementary to slot 201 and vice versa.
[0023] FIG. 3A shows a left side view of filter assembly 401 and
FIG. 3B shows a right side view of filter assembly 401. In one
exemplary embodiment, protrusions 301 may be formed on filter
housing 402 as a feature to facilitate the engagement of a secure
fit of filter assembly 401 within slot 201. In this exemplary
embodiment, slot 201 may be formed with depressions such that
protrusions 301 would mate with the depressions when filter
assembly 401 is inserted completely into slot 201. In another
exemplary embodiment, a shelf 302 may be formed on a back side of
filter housing 402 as a feature to facilitate the engagement of a
secure fit of filter housing 402 within slot 201. In this exemplary
embodiment, slot 201 may be formed with a notch such that shelf 302
would mate with the notch when filter assembly 401 is inserted
completely into slot 201. In another exemplary embodiment, channels
303 may be formed on the sides of filter housing 402 as a feature
to facilitate the engagement of a secure fit of filter assembly 401
within slot 201. In this exemplary embodiment, slot 201 may be
formed with projections such that channels 303 would mate with the
projections when filter assembly 401 is inserted completely into
slot 201.
[0024] FIG. 3C shows a perspective view of filter assembly 401. In
another exemplary embodiment, filter housing 402 may be formed with
boundary extension 304 such that boundary extension 304 extends
below the plane of filter 403. In this exemplary embodiment, slot
201 may be formed with a boundary groove such that boundary
extension 304 would mate with the boundary groove when filter
assembly 401 is inserted completely into slot 201. In another
exemplary embodiment, enlargement 305 is formed on filter housing
402. In this exemplary embodiment, pressure generating device 2
would be formed with a depressed ring 202 around slot 201 such that
enlargement 305 would mate with depressed ring 202 when filter
assembly 401 is inserted completely into slot 201. FIG. 3D shows a
plan view of the top side of filter assembly 401, FIG. 3E shows a
plan view of the bottom side of filter assembly 401, FIG. 3F shows
a front side view of filter assembly 401, and FIG. 3G shows a back
side view of filter assembly 401. While FIG. 2 and FIGS. 3A-G
illustrate protrusions 301, shelf 302, channels 303, extension 304,
enlargement 305, and depressed ring 202 as features for
facilitating a secure fit of filter assembly 401 within slot 201,
it will be appreciated that other features may be used to
facilitate a secure fit of filter assembly 401 within slot 201
without departing from the scope of the disclosed concept.
[0025] FIG. 4A is an illustration of a filter assembly 401
according to an exemplary embodiment of the disclosed concept.
Filter assembly 401 includes filter housing 402 and filter media
403. Filter media 403 is flexible, while also comprising a
geometric plane. The dimensions and disposition of filter media 403
within filter housing 402 are such that a filtering section 404 of
filter media 403 is disposed within filter housing 402 and a
non-filtering section 405 of filter media 403 is disposed outside
of filter housing 402. Filtering section 404 performs the function
of filtering the flow of incoming air in pressure generating device
2 (breathing gas C shown in FIG. 1), while non-filtering section
405 is isolated from the flow of incoming air and does not perform
the filtering function. Because non-filtering portion 405 of filter
media 403 is isolated from the flow of incoming air, when filter
assembly 401 is removed from slot 201, the contaminant saturation
level of filtering section 404 is readily apparent when filtering
section 404 is visually compared to non-filtering section 405. In
addition to serving as a reference for the contaminant saturation
level of filtering section 404, non-filtering portion 405 serves
the purpose of acting as a pull tab that facilitates ease of
removal of filter media 403 from filter housing 402. In one
exemplary embodiment of the disclosed concept, a length 406 of
non-filtering portion 405 measures at least 1 cm long from an edge
407 of filter housing 402 to an edge 408 of non-filtering portion
405. In an alternative exemplary embodiment of the disclosed
concept, the length 406 of non-filtering portion 405 is at least
20% of the overall length 409 of filter media 403 from edge 408 to
an opposite edge 410. However, it will be appreciated that length
406 may be of any length that permits a user to effectively use
non-filtering portion 405 as a pull tab for removing filter media
403 from filter housing 402 without departing from the scope of the
disclosed concept.
[0026] FIG. 4C illustrates an unused filter and shows no contrast
between filtering section 404 and non-filtering section 405. FIG.
4D illustrates a mid-life filter and shows moderate contrast
between filtering section 404 and non-filtering section 405. FIG.
4E illustrates an end-life filter and shows maximum contrast
between filtering section 404 and non-filtering section 405. In an
exemplary embodiment, filtering section 404 and non-filtering
section 405 are separated by a seal to isolate non-filtering
section 405 from the flow of incoming air, and said seal could be
formed by over-molding filter housing 402 around filter media 403.
It will be appreciated, however, that filter section 404 and
non-filtering section 405 may be separated by other means to
isolate non-filtering section 405 from the flow of incoming air
without departing from the scope of the disclosed concept.
[0027] In the claims, any reference signs placed between
parentheses shall not be construed as limiting the claim. The word
"comprising" or "including" does not exclude the presence of
elements or steps other than those listed in a claim. In a device
claim enumerating several means, several of these means may be
embodied by one and the same item of hardware. The word "a" or "an"
preceding an element does not exclude the presence of a plurality
of such elements. In any device claim enumerating several means,
several of these means may be embodied by one and the same item of
hardware. The mere fact that certain elements are recited in
mutually different dependent claims does not indicate that these
elements cannot be used in combination.
[0028] Although this description includes details for the purpose
of illustration based on what is currently considered to be the
most practical and preferred embodiments, it is to be understood
that such detail is solely for that purpose and that the disclosure
is not limited to the disclosed embodiments, but, on the contrary,
is intended to cover modifications and equivalent arrangements that
are within the spirit and scope of the appended claims. For
example, it is to be understood that, to the extent possible, one
or more features of any embodiment are contemplated to be combined
with one or more features of any other embodiment.
* * * * *